Ex-service power battery stepped utilization energy storage device

Abstract

The invention relates to an energy storage device for stepped utilization of retired power batteries, and belongs to the technical field of energy storage devices.The energy storage device for stepped utilization of retired power batteries comprises a device main body, and a protection plate and a cleaning scraper are arranged; in order to improve the shielding protection effect of the photovoltaic panel in severe weather and improve the wiping and cleaning effect of dust on the surface of the photovoltaic panel after long-time use, a first servo motor can be turned on to drive a protection plate to slide along the outer wall of a limiting rod through rotation of a first threaded rod, so that the protection plate slides in a centering manner, and the photovoltaic panel is prevented from being damaged. And a second servo motor can be turned on to drive a lifting block to slide along the outer wall of a sliding rod through rotation of a second threaded rod, the lifting block slides to drive a cleaning scraper to clean the surface of the photovoltaic panel, and the effect of improving the use effect of the photovoltaic panel is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and more particularly, to a stepped utilization energy storage device for retired power batteries. Background Art

[0002] With the gradual industrialization of electric vehicles, a large number of vehicle power batteries will be phased out in the next few years. Although power batteries can no longer be used in electric vehicles, they can still be used in other applications with lower requirements for batteries, such as energy storage systems. By means of stepped utilization, we can extend the service life of the batteries and reduce the overall life cycle cost of power batteries, which is of great significance for promoting the healthy development of the electric vehicle industry.

[0003] After retrieval, according to the prior art CN211126582U, it relates to a stepped utilization energy storage device for retired power batteries, including a cabinet body, a cabinet door hinged at the front end of the cabinet body, heat dissipation slots opened on both sides and the rear side of the cabinet body, a dust-proof net fixedly installed inside the heat dissipation slots, a photovoltaic panel fixedly installed on the top of the cabinet body, multiple placement plates installed in the inner cavity of the cabinet body from top to bottom, retired power battery packs, a first DC-DC voltage stabilizing unit, a second DC-DC voltage stabilizing unit, a DC / AC inversion unit and a controller installed on the placement plates. The controller is provided with a control chip, an alarm unit and a charge / discharge unit. The photovoltaic panel is connected to the DC / AC inversion unit through the first DC-DC voltage stabilizing unit, the retired power battery pack is connected to the DC / AC inversion unit through the second DC-DC voltage stabilizing unit, and the control chip is connected to the first DC-DC voltage stabilizing unit, the second DC-DC voltage stabilizing unit and the DC / AC inversion unit. The working principle of this utility model is simple, which can make full use of the remaining capacity of retired power batteries, can charge the retired power battery pack through the photovoltaic panel and then store energy, and extends the service life of power batteries.

[0004] After retrieval, according to the prior art CN212183178U, it relates to a photovoltaic energy storage power supply device based on retired power battery energy storage, including: a box body, an energy storage power supply placed inside the box body, a solar inverter and controller integrated machine placed inside the box body and electrically connected to the energy storage power supply, a lifting mechanism fixedly connected to the upper half of the box body, and a photovoltaic module arranged on the lifting mechanism. The top of the box body is provided with an openable cover controlled by a motor; the bottom of the box body is provided with rollers. This utility model is convenient to operate and has a wide range of applications. It can be moved at any time according to the power consumption needs and can be widely used in places such as emergency power supply and disaster relief. Since there are many extreme weather conditions such as typhoons in coastal areas, the photovoltaic panel can be retracted into the box body during typhoon days to improve the service life. Moreover, the device can use a waste container as the box body and retired batteries as the energy storage power supply, making reasonable and effective use of resources. The device has high power generation and energy storage efficiency and can make more reasonable use of photovoltaic power generation.

[0005] However, when the existing energy storage devices are in use, although they can store and use electrical energy well through photovoltaic panels, when the photovoltaic panels are used to assist the energy storage devices in daily use, and when the photovoltaic panels are used in daily life, the wiping effect on the dust adsorbed on the surface of the photovoltaic panels is not high. Moreover, when wiping with a cleaning scraper, the convenience of disassembling, installing, and replacing the cleaning scraper is not high. At the same time, when the photovoltaic panels are placed exposed, the shielding and protection effect on the surface of the photovoltaic panels is not high, which easily causes gravel to come into contact with the photovoltaic panels, resulting in damage to the photovoltaic panels and not meeting the usage requirements of people. For this reason, we propose a stepped utilization energy storage device for retired power batteries. Summary of the Invention

[0006] To solve the problems mentioned in the above background, the present invention provides a stepped utilization energy storage device for retired power batteries to solve the problems of low wiping effect on the dust adsorbed on the surface of the photovoltaic panels, low convenience of disassembling, installing, and replacing the cleaning scraper when wiping with the cleaning scraper, and low shielding and protection effect on the surface of the photovoltaic panels when the photovoltaic panels are placed exposed as mentioned in the above background technology.

[0007] To achieve the above technical objectives, the technical solution adopted by the present invention is as follows: A stepped utilization energy storage device for retired power batteries, including a device main body. The device main body includes heat dissipation holes, a cabinet door main body, an observation window, a placement board, a retired power battery pack, a controller, a first DC-DC voltage stabilization unit, a second DC-DC voltage stabilization unit, a DC / AC inversion unit, a slide rail rod, a connecting frame, an adjustment motor, a photovoltaic panel, and a protection mechanism arranged on the outer wall of the photovoltaic panel. Heat dissipation holes are provided on the side wall of the device main body. The cabinet door main body is rotatably connected to the outer wall of the device main body. An observation window is arranged on the outer wall of the cabinet door main body. A slide rail rod is fixedly connected to the inner wall of the cabinet door main body. A placement board is slidably connected to the inner side wall of the slide rail rod. A retired power battery pack is arranged on the outer wall of the placement board. A controller is arranged on the outer wall of the placement board. A first DC-DC voltage stabilization unit is arranged on the outer wall of the placement board. A second DC-DC voltage stabilization unit is arranged on the placement board. A DC / AC inversion unit is arranged on the placement board. A connecting frame is fixedly connected to the top of the device main body. An adjustment motor is fixedly connected to the outer wall of the connecting frame. The output end of the adjustment motor is fixedly connected to a photovoltaic panel rotatably connected to the outer wall of the connecting frame;

[0008] The protection mechanism includes a centering component and a lifting component;

[0009] The centering component includes a first servo motor, a first threaded rod, a protective plate, and a limiting rod. A first servo motor is fixedly connected to the outer wall of the photovoltaic panel. The output end of the first servo motor is fixedly connected to a first threaded rod rotatably connected to the outer wall of the photovoltaic panel. A protective plate slidably connected to the outer wall of the photovoltaic panel is threadedly connected to the outer wall of the first threaded rod. A limiting rod fixedly connected to the outer wall of the photovoltaic panel is slidably connected to the outer wall of the protective plate;

[0010] The lifting component includes a second servo motor, a second threaded rod, a lifting block, a sliding rod, and a cleaning scraper. A second servo motor is fixedly connected to the outer wall of the photovoltaic panel. The output end of the second servo motor is fixedly connected to a second threaded rod rotatably connected to the outer wall of the photovoltaic panel. A lifting block is threadedly connected to the outer wall of the second threaded rod. A sliding rod fixedly connected to the outer wall of the photovoltaic panel is slidably connected to the outer wall of the lifting block. A cleaning scraper fitting the surface of the photovoltaic panel is detachably connected to the outer wall of the lifting block.

[0011] Preferably, a clamping mechanism is arranged on the outer wall of the lifting block, and a positioning mechanism is arranged on the inner side wall of the device main body.

[0012] Preferably, the controller is provided with a control chip, a charge and discharge unit, and an alarm unit. The photovoltaic panel is connected to the DC / AC inverter unit through a first DC-DC voltage stabilizing unit. The retired power battery pack is connected to the DC / AC inverter unit through a second DC-DC voltage stabilizing unit. The control chip is connected to the alarm unit, and the control chip is connected to the retired power battery pack through the charge and discharge unit.

[0013] Preferably, there are two groups of the first threaded rods, and the rotation directions of the two groups of the first threaded rods are opposite. The protective plate forms a sliding structure between the first threaded rod and the limiting rod. There are two groups of the protective plates, and the positions of the two groups of the protective plates are symmetric about the central axis of the photovoltaic panel.

[0014] Preferably, the lifting block forms a lifting structure between the second threaded rod and the sliding rod. The cleaning scraper forms a cleaning structure with the photovoltaic panel through the lifting block and the sliding rod. The length of the cleaning scraper is greater than the width of the photovoltaic panel.

[0015] Preferably, the clamping mechanism is composed of a first nut, a first bolt, and a card slot. A first nut is arranged on the outer wall of the lifting block. A first bolt slidably connected to the outer wall of the cleaning scraper is threadedly connected to the inner wall of the first nut. A card slot is opened at the connection part between the outer wall of the cleaning scraper and the first bolt.

[0016] Preferably, the cleaning scraper forms a clamping structure with the lifting block through the first bolt and the card slot. There are two groups of both the first bolt and the card slot, and the positions of the two groups of the first bolt and the card slot are symmetric about the central axis of the cleaning scraper.

[0017] Preferably, the positioning mechanism includes a second nut, a second bolt, a sliding block, a lifting groove, a positioning rod and a spring. The inner side wall of the device body is fixedly connected with the second nut. The inner wall of the second nut is threadedly connected with the second bolt. One end of the second bolt is rotatably connected with a sliding block that is slidably connected with the inner side wall of the device body. A lifting groove is formed at the connection part between the inner side wall of the device body and the sliding block. The outer wall of the sliding block is fixedly connected with a positioning rod that is slidably connected with the outer wall of the slide rail rod. The outer wall of the sliding block is fixedly connected with a spring that is fixedly connected with the inner side wall of the device body.

[0018] Preferably, the sliding block forms a sliding structure with the lifting groove through the second bolt, and the positioning rod forms a clamping structure with the placing plate through the sliding block and the lifting groove.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. For this energy storage device for stepped utilization of retired power batteries, by setting a protection plate and a cleaning scraper, when converting light energy into electrical energy for energy storage through a photovoltaic panel, in order to improve the shielding protection effect of the photovoltaic panel in bad weather and improve the wiping and cleaning effect of dust on the surface of the photovoltaic panel during long-term use, the first servo motor can be turned on to drive the protection plate to slide along the outer wall of the limiting rod through the rotation of the first threaded rod, so that the protection plate slides centrally to achieve the effect of completely shielding and protecting the photovoltaic panel. And the second servo motor can be turned on to drive the lifting block to slide along the outer wall of the sliding rod through the rotation of the second threaded rod. The sliding of the lifting block drives the cleaning scraper to clean the surface of the photovoltaic panel, playing a role in improving the use effect of the photovoltaic panel.

[0021] 2. For this energy storage device for stepped utilization of retired power batteries, by setting a card slot, when the cleaning scraper wipes the dust on the surface of the photovoltaic panel, the first bolt can be rotated through the limiting action of the first nut, so that the first bolt slides out from the inner wall of the card slot, achieving the effect of detaching the cleaning scraper from the outer wall of the lifting block, playing a role in facilitating the disassembly, installation and replacement of the cleaning scraper.

[0022] 3. For this energy storage device for stepped utilization of retired power batteries, by setting a positioning rod, when placing the devices required by the energy storage device through the placing plate, in order to improve the convenience of pulling and overhauling the required devices in the device, the second bolt can be rotated through the limiting action of the second nut, so that the sliding block slides along the inner wall of the lifting groove and drives the compressed spring to lift synchronously, so that the positioning rod does not contact the placing plate, and the placing plate can be pulled out from the inner side wall of the slide rail rod, achieving the effect of pulling out the required devices from the device for overhaul. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic side view structure diagram of the overall structure of the present invention;

[0025] Figure 3 is a schematic diagram of the overall internal structure of the present invention;

[0026] Figure 4 is a schematic diagram of the position distribution structure of the photovoltaic panels of the present invention;

[0027] Figure 5 is a schematic diagram of the position distribution structure of the adjusting motors of the present invention;

[0028] Figure 6 is a schematic diagram of the position distribution structure of the protection plates of the present invention;

[0029] Figure 7 is a schematic diagram of the position distribution structure of the first threaded rod of the present invention;

[0030] Figure 8 is a schematic diagram of the position distribution structure of the lifting blocks of the present invention;

[0031] Figure 9 is a schematic diagram of the position distribution structure of the card slots of the present invention;

[0032] Figure 10 of the present invention Figure 3 is an enlarged schematic structure diagram at position A.

[0033] The reference numerals in the drawings are:

[0034] 1, device main body; 2, heat dissipation holes; 3, cabinet door main body; 4, observation window; 5, placement plate; 6, retired power battery pack; 7, controller; 8, first DC-DC voltage stabilization unit; 9, second DC-DC voltage stabilization unit; 10, DC / AC inverter unit; 11, slide rail rod; 12, connecting frame; 13, adjusting motor; 14, photovoltaic panel; 15, first servo motor; 16, first threaded rod; 17, protection plate; 18, limiting rod; 19, second servo motor; 20, second threaded rod; 21, lifting block; 22, sliding rod; 23, cleaning scraper; 24, engaging mechanism; 2401, first nut; 2402, first bolt; 2403, card slot; 25, positioning mechanism; 2501, second nut; 2502, second bolt; 2503, sliding block; 2504, lifting groove; 2505, positioning rod; 2506, spring. Detailed implementation manners

[0035] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present invention as follows.

[0036] Example, please refer to Figures 1 to 10 , this embodiment provides a stepped utilization energy storage device for retired power batteries, including a device main body 1. The device main body 1 includes a heat dissipation hole 2, a cabinet door main body 3, an observation window 4, a placement plate 5, a retired power battery pack 6, a controller 7, a first DC-DC voltage stabilizing unit 8, a second DC-DC voltage stabilizing unit 9, a DC / AC inverter unit 10, a slide rail rod 11, a connecting frame 12, an adjusting motor 13, a photovoltaic panel 14 and a protection mechanism arranged on the outer wall of the photovoltaic panel 14. A heat dissipation hole 2 is provided on the side wall of the device main body 1. The outer wall of the device main body 1 is rotatably connected with a cabinet door main body 3. An observation window 4 is arranged on the outer wall of the cabinet door main body 3. The inner wall of the cabinet door main body 3 is fixedly connected with a slide rail rod 11. The inner side wall of the slide rail rod 11 is slidably connected with a placement plate 5. A retired power battery pack 6 is arranged on the outer wall of the placement plate 5. A controller 7 is arranged on the outer wall of the placement plate 5. A first DC-DC voltage stabilizing unit 8 is arranged on the placement plate 5. A second DC-DC voltage stabilizing unit 9 is arranged on the placement plate 5. A DC / AC inverter unit 10 is arranged on the placement plate 5. The top of the device main body 1 is fixedly connected with a connecting frame 12. The outer wall of the connecting frame 12 is fixedly connected with an adjusting motor 13. The output end of the adjusting motor 13 is fixedly connected with a photovoltaic panel 14 rotatably connected with the outer wall of the connecting frame 12;

[0037] The protection mechanism includes a centering component and a lifting component;

[0038] The centering component includes a first servo motor 15, a first threaded rod 16, a protection plate 17 and a limiting rod 18. The outer wall of the photovoltaic panel 14 is fixedly connected with a first servo motor 15. The output end of the first servo motor 15 is fixedly connected with a first threaded rod 16 rotatably connected with the outer wall of the photovoltaic panel 14. The outer wall of the first threaded rod 16 is threadedly connected with a protection plate 17 slidably connected with the outer wall of the photovoltaic panel 14. The outer wall of the protection plate 17 is slidably connected with a limiting rod 18 fixedly connected with the outer wall of the photovoltaic panel 14;

[0039] The lifting component includes a second servo motor 19, a second threaded rod 20, a lifting block 21, a sliding rod 22 and a cleaning scraper 23. The outer wall of the photovoltaic panel 14 is fixedly connected with a second servo motor 19. The output end of the second servo motor 19 is fixedly connected with a second threaded rod 20 rotatably connected with the outer wall of the photovoltaic panel 14. The outer wall of the second threaded rod 20 is threadedly connected with a lifting block 21. The outer wall of the lifting block 21 is slidably connected with a sliding rod 22 fixedly connected with the outer wall of the photovoltaic panel 14. The outer wall of the lifting block 21 is detachably connected with a cleaning scraper 23 that fits the surface of the photovoltaic panel 14.

[0040] Further, a clamping mechanism 24 is provided on the outer wall of the lifting block 21, and a positioning mechanism 25 is provided on the inner side wall of the device main body 1.

[0041] Further, a control chip, a charge and discharge unit, and an alarm unit are provided in the controller 7. The photovoltaic panel 14 is connected to the DC / AC inverter unit 10 through the first DC-DC voltage stabilizing unit 8, and the retired power battery pack 6 is connected to the DC / AC inverter unit 10 through the second DC-DC voltage stabilizing unit 9. The control chip is connected to the alarm unit, and the control chip is connected to the retired power battery pack 6 through the charge and discharge unit, which is beneficial to improving the convenient use of the energy storage device by providing a control chip, a charge and discharge unit, and an alarm unit in the controller 7.

[0042] Further, there are two groups of first threaded rods 16, and the rotation directions of the two groups of first threaded rods 16 are opposite. The protective plate 17 forms a sliding structure between the first threaded rod 16 and the limiting rod 18. There are two groups of protective plates 17, and the positions of the two groups of protective plates 17 are symmetric about the central axis of the photovoltaic panel 14, which is beneficial to the rotation of the first threaded rod 16, driving the protective plate 17 to slide conveniently along the limiting rod 18, playing a role in driving the protective plate 17 to slide centrally conveniently, and achieving the effect of effectively shielding and protecting the photovoltaic panel 14 when not in use.

[0043] Further, the lifting block 21 forms a lifting structure between the second threaded rod 20 and the sliding rod 22, and the cleaning scraper 23 forms a cleaning structure with the photovoltaic panel 14 through the lifting block 21 and the sliding rod 22. The length of the cleaning scraper 23 is greater than the width of the photovoltaic panel 14, which is beneficial to the rotation of the second threaded rod 20, driving the lifting block 21 to slide along the outer wall of the sliding rod 22, playing a role in driving the cleaning scraper 23 to slide conveniently, and playing a role in conveniently wiping and cleaning the photovoltaic panel 14.

[0044] Further, the clamping mechanism 24 includes a first nut 2401, a first bolt 2402, and a card slot 2403. A first nut 2401 is provided on the outer wall of the lifting block 21. The inner wall of the first nut 2401 is threadedly connected with a first bolt 2402 that is slidably connected to the outer wall of the cleaning scraper 23. A card slot 2403 is opened at the connection part between the outer wall of the cleaning scraper 23 and the first bolt 2402. By providing the card slot 2403, when the cleaning scraper 23 wipes the dust on the surface of the photovoltaic panel 14, it is beneficial to rotate the first bolt 2402 and, through the limiting effect of the first nut 2401, make the first bolt 2402 slide out from the inner wall of the card slot 2403, achieving the effect of detaching and disassembling the cleaning scraper 23 from the outer wall of the lifting block 21, and playing a role in conveniently disassembling, installing, and replacing the cleaning scraper 23 for use.

[0045] Further, the cleaning scraper 23 forms a clamping structure with the lifting block 21 through the first bolt 2402 and the clamping groove 2403. Both the first bolt 2402 and the clamping groove 2403 are provided with two groups, and the position distributions of the two groups of the first bolt 2402 and the clamping groove 2403 are symmetrical about the central axis of the cleaning scraper 23, which is beneficial to the connection between the first bolt 2402 and the clamping groove 2403, driving the clamping installation between the cleaning scraper 23 and the lifting block 21, and achieving the effect of improving the convenient disassembly, replacement and use of the cleaning scraper 23.

[0046] Further, the positioning mechanism 25 includes a second nut 2501, a second bolt 2502, a sliding block 2503, a lifting groove 2504, a positioning rod 2505 and a spring 2506. The inner side wall of the device main body 1 is fixedly connected with the second nut 2501, the inner wall of the second nut 2501 is threadedly connected with the second bolt 2502, one end of the second bolt 2502 is rotatably connected with a sliding block 2503 slidably connected to the inner side wall of the device main body 1, a lifting groove 2504 is opened at the connection part of the inner side wall of the device main body 1 and the sliding block 2503, the outer wall of the sliding block 2503 is fixedly connected with a positioning rod 2505 slidably connected to the outer wall of the slide rail rod 11, and the outer wall of the sliding block 2503 is fixedly connected with a spring 2506 fixedly connected to the inner side wall of the device main body 1. By setting the positioning rod 2505, when placing the required devices of the energy storage device through the placing plate 5, in order to improve the convenience of pulling and overhauling the required devices in the device, the second bolt 2502 can be rotated through the limiting action of the second nut 2501, so that the sliding block 2503 slides along the inner wall of the lifting groove 2504, and drives the compressed spring 2506 to perform a synchronous lifting movement, so that the positioning rod 2505 does not contact the placing plate 5, and the placing plate 5 is pulled out from the inner side wall of the slide rail rod 11, achieving the effect of pulling out and overhauling the required devices from the device.

[0047] Further, the sliding block 2503 forms a sliding structure with the lifting groove 2504 through the second bolt 2502, and the positioning rod 2505 forms a clamping structure with the placing plate 5 through the sliding block 2503 and the lifting groove 2504, which is beneficial to the rotation of the second bolt 2502, driving the sliding block 2503 to slide along the inner wall of the lifting groove 2504, and playing an effective role in clamping and fixing the placing plate 5.

[0048] Such as Figure 1As shown, for this energy storage device for stepped utilization of retired power batteries, during use, first, when storing energy by converting sunlight into electricity through the photovoltaic panel 14, in order to improve the shielding and protection effect of the photovoltaic panel 14 in bad weather and the wiping and cleaning effect of the dust on the surface of the photovoltaic panel 14 during long-term use, the first servo motor 15 can be turned on. Through the rotation of the first threaded rod 16, the protective plate 17 is driven to slide along the outer wall of the limiting rod 18, so that the protective plate 17 slides in a centered manner to achieve the effect of completely shielding and protecting the photovoltaic panel 14. And the second servo motor 19 can be turned on. Through the rotation of the second threaded rod 20, the lifting block 21 is driven to slide along the outer wall of the sliding rod 22. The sliding of the lifting block 21 drives the cleaning scraper 23 to clean the surface of the photovoltaic panel 14, playing a role in improving the use effect of the photovoltaic panel 14;

[0049] Next, when the cleaning scraper 23 wipes the dust on the surface of the photovoltaic panel 14, the first bolt 2402 can be rotated. Through the limiting effect of the first nut 2401, the first bolt 2402 slides out from the inner wall of the card slot 2403, achieving the effect of detaching and disassembling the cleaning scraper 23 from the outer wall of the lifting block 21, playing a role in facilitating the disassembly, installation, replacement and use of the cleaning scraper 23;

[0050] Finally, when placing the devices required for the energy storage device through the placement plate 5, in order to improve the convenience of pulling and overhauling the required devices in the device, the second bolt 2502 can be rotated. Through the limiting effect of the second nut 2501, the sliding block 2503 slides along the inner wall of the lifting groove 2504, and drives the compressed spring 2506 to perform a synchronous lifting movement, so that the positioning rod 2505 does not contact the placement plate 5, and the placement plate 5 performs a pulling movement from the inner side wall of the slide rail rod 11, achieving the effect of pulling out and overhauling the required devices from the device.

[0051] The above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to form an equivalent embodiment with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A retired power battery step-by-step utilization energy storage device, comprising a device body, characterized in that: The device body comprises heat dissipation holes, a cabinet door body, an observation window, a placement plate, a retired power battery pack, a controller, a first DC-DC voltage stabilizing unit, a second DC-DC voltage stabilizing unit, a DC / AC inverter unit, a slide rail, a connecting frame, an adjusting motor, a photovoltaic panel and a protective mechanism arranged on the outer wall of the photovoltaic panel. The side wall of the device body is provided with heat dissipation holes, the outer wall of the device body is rotatably connected with the cabinet door body, the outer wall of the cabinet door body is provided with an observation window, the inner wall of the cabinet door body is fixedly connected with the slide rail, the inner side wall of the slide rail is slidably connected with the placement plate, the outer wall of the placement plate is provided with a retired power battery pack, the outer wall of the placement plate is provided with a controller, the outer wall of the placement plate is provided with a first DC-DC voltage stabilizing unit, the placement plate is provided with a second DC-DC voltage stabilizing unit, the placement plate is provided with a DC / AC inverter unit, the top of the device body is fixedly connected with the connecting frame, the outer wall of the connecting frame is fixedly connected with the adjusting motor, and the output end of the adjusting motor is fixedly connected with the photovoltaic panel rotatably connected with the outer wall of the connecting frame; The protection mechanism includes a centering component and a lifting component; The centering assembly includes a first servo motor, a first threaded rod, a protective plate and a limit rod, the outer wall of the photovoltaic panel is fixedly connected to the first servo motor, the output end of the first servo motor is fixedly connected to the first threaded rod rotatably connected to the outer wall of the photovoltaic panel, the outer wall of the first threaded rod is threadedly connected to the protective plate slidably connected to the outer wall of the photovoltaic panel, and the outer wall of the protective plate is slidably connected to the limit rod fixedly connected to the outer wall of the photovoltaic panel; The lifting assembly includes a second servo motor, a second threaded rod, a lifting block, a sliding rod and a cleaning scraper. The outer wall of the photovoltaic panel is fixedly connected to the second servo motor, the output end of the second servo motor is fixedly connected to the second threaded rod rotatably connected to the outer wall of the photovoltaic panel, the outer wall of the second threaded rod is threadedly connected to the lifting block, the outer wall of the lifting block is slidably connected to the sliding rod fixedly connected to the outer wall of the photovoltaic panel, and the outer wall of the lifting block is detachably connected to a cleaning scraper that fits the surface of the photovoltaic panel.

2. The energy storage device for stepwise utilization of retired power batteries according to claim 1 is characterized in that: The outer wall of the lifting block is provided with a locking mechanism, and the inner wall of the device body is provided with a positioning mechanism.

3. The step-by-step utilization energy storage device for retired power batteries according to claim 1 is characterized in that: The controller is provided with a control chip, a charge and discharge unit and an alarm unit. The photovoltaic panel is connected to the DC / AC inverter unit through a first DC-DC voltage regulator unit, the retired power battery pack is connected to the DC / AC inverter unit through a second DC-DC voltage regulator unit, the control chip is connected to the alarm unit, and the control chip is connected to the retired power battery pack through the charge and discharge unit.

4. The energy storage device for stepwise utilization of retired power batteries according to claim 1 is characterized in that: The first threaded rods are provided with two groups, and the rotation directions of the two groups of the first threaded rods are opposite. The protective plates form a sliding structure through the first threaded rods and the limiting rods. The protective plates are provided with two groups, and the position distribution of the two groups of the protective plates is symmetrical about the central axis of the photovoltaic panel.

5. The energy storage device for stepwise utilization of retired power batteries according to claim 1 is characterized in that: The lifting block forms a lifting structure through the second threaded rod and the sliding rod, and the cleaning scraper forms a cleaning structure through the lifting block, the sliding rod and the photovoltaic panel. The length of the cleaning scraper is greater than the width of the photovoltaic panel.

6. The step-by-step utilization energy storage device for retired power batteries according to claim 2 is characterized in that: The locking mechanism is composed of a first nut, a first bolt and a slot. The outer wall of the lifting block is provided with a first nut. The inner wall of the first nut is threadedly connected with a first bolt which is slidably connected to the outer wall of the cleaning scraper. A slot is provided at the connection between the outer wall of the cleaning scraper and the first bolt.

7. The energy storage device for stepwise utilization of retired power batteries according to claim 6 is characterized in that: The cleaning scraper forms a clamping structure with the lifting block through the first bolts and the clamping slots. The first bolts and the clamping slots are provided in two groups, and the positions of the two groups of the first bolts and the clamping slots are symmetrical about the central axis of the cleaning scraper.

8. The energy storage device for stepwise utilization of retired power batteries according to claim 2 is characterized in that: The positioning mechanism includes a second nut, a second bolt, a sliding block, a lifting groove, a positioning rod and a spring. The inner side wall of the device body is fixedly connected with the second nut, the inner wall of the second nut is threadedly connected with the second bolt, one end of the second bolt is rotatably connected with the sliding block that is slidably connected to the inner side wall of the device body, a lifting groove is provided at the connection part between the inner side wall of the device body and the sliding block, the outer wall of the sliding block is fixedly connected with the positioning rod that is slidably connected to the outer wall of the slide rail rod, and the outer wall of the sliding block is fixedly connected with the spring that is fixedly connected to the inner side wall of the device body.

9. The step-by-step utilization energy storage device for retired power batteries according to claim 8 is characterized in that: The sliding block forms a sliding structure with the lifting slot through the second bolt.

10. The retired power battery step-by-step utilization energy storage device according to claim 9, characterized in that: The positioning rod forms a clamping structure with the placement plate through the sliding block and the lifting slot.

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